nss.dn.ua has no NS records.
NS records for this zone are defined at dn.ua.
NS records for this zone are defined at dn.ua.
Question and response
Question
dig nss.dn.ua. NS
Answer
The response has no answer records.
Authority
dn.ua. 1800 SOA ho1.eunic.net.ua. info.eunic.net.ua. 2603060030 3600 1800 1814400 1800
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0